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I wasn't demanding the bug be fixed in the present source
base.  I understand that's impractical due to the invasive
nature of the PyObject_VAR_HEAD macro trick.

I was just trying to clarify that the trick is an invalid
coding practice even under C89.  I didn't want people
assuming it was ok because of them thinking it was only a
problem under C99 and later standards while safe under C89.